emerge dev-java/icedtea:8
Calculating dependencies  
 * IMPORTANT: 2 news items need reading for repository 'gentoo'.
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... done!


[ebuild  N     ] dev-java/icedtea-3.21.0:8::gentoo-bootstrap  USE="alsa cups gtk jbootstrap pch source system-lcms (-cacao) -doc -examples -headless-awt (-jamvm) -kerberos -pax-kernel -pulseaudio -sctp (-selinux) -shenandoah -smartcard -test -zero" 61,577 KiB

Total: 1 package (1 new), Size of downloads: 61,577 KiB

 * Error: circular dependencies:

(dev-java/icedtea-3.21.0:8/8::gentoo-bootstrap, ebuild scheduled for merge) depends on
 (dev-java/icedtea-3.21.0:8/8::gentoo-bootstrap, ebuild scheduled for merge) (buildtime)

 * Note that circular dependencies can often be avoided by temporarily
 * disabling USE flags that trigger optional dependencies.

The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by net-print/cups-filters-1.28.10-r1::gentoo[postscript]
# required by net-print/cups-2.3.3_p2-r3::gentoo
# required by dev-java/icedtea-3.21.0::gentoo-bootstrap[cups]
# required by dev-java/icedtea:8 (argument)
>=app-text/ghostscript-gpl-9.55.0-r1 cups
# required by x11-misc/xdg-utils-1.1.3_p20200220-r5::gentoo
# required by net-print/cups-2.3.3_p2-r3::gentoo[X]
# required by app-text/ghostscript-gpl-9.55.0-r1::gentoo[cups]
# required by net-print/cups-filters-1.28.10-r1::gentoo[postscript]
>=app-text/xmlto-0.0.28-r6 text

Use --autounmask-write to write changes to config files (honoring
CONFIG_PROTECT). Carefully examine the list of proposed changes,
paying special attention to mask or keyword changes that may expose
experimental or unstable packages.

 * In order to avoid wasting time, backtracking has terminated early
 * due to the above autounmask change(s). The --autounmask-backtrack=y
 * option can be used to force further backtracking, but there is no
 * guarantee that it will produce a solution.